20225399865 has 24 divisors (see below), whose sum is σ = 35569962624. Its totient is φ = 9806253600.

The previous prime is 20225399839. The next prime is 20225399941. The reversal of 20225399865 is 56899352202.

It is not a de Polignac number, because 20225399865 - 2¹² = 20225395769 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5569921 + ... + 5573550.

It is an arithmetic number, because the mean of its divisors is an integer number (1482081776).

Almost surely, 2^20225399865 is an apocalyptic number.

It is an amenable number.

20225399865 is a deficient number, since it is larger than the sum of its proper divisors (15344562759).

20225399865 is a wasteful number, since it uses less digits than its factorization.

20225399865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11143501 (or 11143490 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 20225399865 in words is "twenty billion, two hundred twenty-five million, three hundred ninety-nine thousand, eight hundred sixty-five".